English verb conjugation
OUGHT TO UNDERTAIN

Regular verb: undertain - undertained - undertained

Affirmation

Simple form	V-ing form
I ought to undertain you ought to undertain she ought to undertain we ought to undertain you ought to undertain they ought to undertain	I ought to be undertaining you ought to be undertaining she ought to be undertaining we ought to be undertaining you ought to be undertaining they ought to be undertaining
Perfect	V-ing perfect
I ought to have undertained you ought to have undertained she ought to have undertained we ought to have undertained you ought to have undertained they ought to have undertained	I ought to have been undertaining you ought to have been undertaining she ought to have been undertaining we ought to have been undertaining you ought to have been undertaining they ought to have been undertaining

Negation

Simple form	V-ing form
I oughtn't to undertain you oughtn't to undertain she oughtn't to undertain we oughtn't to undertain you oughtn't to undertain they oughtn't to undertain	I oughtn't to be undertaining you oughtn't to be undertaining she oughtn't to be undertaining we oughtn't to be undertaining you oughtn't to be undertaining they oughtn't to be undertaining
Perfect	V-ing perfect
I oughtn't to have undertained you oughtn't to have undertained she oughtn't to have undertained we oughtn't to have undertained you oughtn't to have undertained they oughtn't to have undertained	I oughtn't to have been undertaining you oughtn't to have been undertaining she oughtn't to have been undertaining we oughtn't to have been undertaining you oughtn't to have been undertaining they oughtn't to have been undertaining

Interrogative form

Simple form	V-ing form
ought to I undertain? ought to you undertain? ought to she undertain? ought to we undertain? ought to you undertain? ought to they undertain?	ought to I be undertaining? ought to you be undertaining? ought to she be undertaining? ought to we be undertaining? ought to you be undertaining? ought to they be undertaining?
Perfect	V-ing perfect
ought to I have undertained? ought to you have undertained? ought to she have undertained? ought to we have undertained? ought to you have undertained? ought to they have undertained?	ought to I have been undertaining? ought to you have been undertaining? ought to she have been undertaining? ought to we have been undertaining? ought to you have been undertaining? ought to they have been undertaining?

Interro-negative form

Simple form	V-ing form
oughtn't I to undertain? oughtn't you to undertain? oughtn't she to undertain? oughtn't we to undertain? oughtn't you to undertain? oughtn't they to undertain?	oughtn't I to be undertaining? oughtn't you to be undertaining? oughtn't she to be undertaining? oughtn't we to be undertaining? oughtn't you to be undertaining? oughtn't they to be undertaining?
Perfect	V-ing perfect
oughtn't I to have undertained? oughtn't you to have undertained? oughtn't she to have undertained? oughtn't we to have undertained? oughtn't you to have undertained? oughtn't they to have undertained?	oughtn't I to have been undertaining? oughtn't you to have been undertaining? oughtn't she to have been undertaining? oughtn't we to have been undertaining? oughtn't you to have been undertaining? oughtn't they to have been undertaining?